Results 61 to 70 of about 275 (109)

On Weak Residual Error Estimation *

open access: yes, 1996
. A general framework for weak residual error estimators applying to various types of boundary value problems in connection with finite element and finite volume approximations is developed.
Jinn-liang Liu
core  

Existence results of variable exponent double-phase multivalued elliptic inequalities with logarithmic perturbation and convections

open access: yesAdvances in Nonlinear Analysis
In this study, we deal with a multivalued elliptic variational inequality involving a logarithmic perturbed variable exponents double-phase operator. Additionally, it features a multivalued convection term alongside two multivalued terms, one defined ...
Cen Jinxia   +3 more
doaj   +1 more source

Asymmetric Robin Problems with Indefinite Potential and Concave Terms

open access: yesAdvanced Nonlinear Studies, 2019
We consider a parametric semilinear Robin problem driven by the Laplacian plus an indefinite and unbounded potential. In the reaction, we have the competing effects of a concave term appearing with a negative sign and of an asymmetric asymptotically ...
Papageorgiou Nikolaos S.   +2 more
doaj   +1 more source

An Agmon-Allegretto-Piepenbrink principle for Schrödinger operators. [PDF]

open access: yesRev R Acad Cienc Exactas Fis Nat A Mat, 2022
Buccheri S, Orsina L, Ponce AC.
europepmc   +1 more source

On the Dirichlet Problem for the Ekman Equation

open access: yes, 2007
. The Ekman partial differential equation for the streamfunction of turbulent mass flow in shallow and small sized surface waters is discussed. The Dirichlet problem for the Ekman equation is shown to be well posed in a weighted Sobolev space. Conditions
K. Frischmuth, J. Rossmann
core  

Regularity for critical fractional Choquard equation with singular potential and its applications

open access: yesAdvances in Nonlinear Analysis
We study the following fractional Choquard equation (−Δ)su+u∣x∣θ=(Iα*F(u))f(u),x∈RN,{\left(-\Delta )}^{s}u+\frac{u}{{| x| }^{\theta }}=({I}_{\alpha }* F\left(u))f\left(u),\hspace{1em}x\in {{\mathbb{R}}}^{N}, where N⩾3N\geqslant 3, s∈12,1s\in \left ...
Liu Senli, Yang Jie, Su Yu
doaj   +1 more source

An Improved Fountain Theorem and Its Application

open access: yesAdvanced Nonlinear Studies, 2017
The main aim of the paper is to prove a fountain theorem without assuming the τ-upper semi-continuity condition on the variational functional. Using this improved fountain theorem, we may deal with more general strongly indefinite elliptic problems with ...
Gu Long-Jiang, Zhou Huan-Song
doaj   +1 more source

On The Spectra Of Sums Of Orthogonal Projections With Applications To Parallel Computing

open access: yes, 1991
. Many parallel iterative algorithms for solving symmetric, positive definite problems proceed by solving in each iteration, a number of independent systems on subspaces.
Petter E. Bj��rstad   +2 more
core  

Existence and Multiplicity of Solutions for Resonant (p,2)-Equations

open access: yesAdvanced Nonlinear Studies, 2018
We consider Dirichlet elliptic equations driven by the sum of a p-Laplacian ...
Papageorgiou Nikolaos S.   +2 more
doaj   +1 more source

Nodal Solutions for a Quasilinear Elliptic Equation Involving the p-Laplacian and Critical Exponents

open access: yesAdvanced Nonlinear Studies, 2018
This paper is concerned with the following type of quasilinear elliptic equations in ℝN{\mathbb{R}^{N}} involving the p-Laplacian and critical growth:
Deng Yinbin, Peng Shuangjie, Wang Jixiu
doaj   +1 more source

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